[PATCH] KVM: PPC: Book3S: fix XIVE migration of pending interrupts

[Laurent Vivier]

On 12/12/2017 13:02, Cédric Le Goater wrote:
> When restoring a pending interrupt, we are setting the Q bit to force
> a retrigger in xive_finish_unmask(). But we also need to force an EOI
> in this case to reach the same initial state : P=1, Q=0.
> 
> This can be done by not setting 'old_p' for pending interrupts which
> will inform xive_finish_unmask() that an EOI needs to be sent.
> 
> Suggested-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
> Signed-off-by: Cédric Le Goater <clg at kaod.org>
> ---
> 
>  Tested with a guest running iozone.
> 
>  arch/powerpc/kvm/book3s_xive.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

We really need this patch to fix VM migration on POWER9.
When will it be merged?

Thanks,
Laurent